HP CQ35-202TX, CQ35-229TX manual Fan/heat sink assembly, k. System board see “System board” on page

Removal and replacement procedures

Fan/heat sink assembly

✎The fan/heat sink assembly spare part kit includes replacement thermal material.

Description	Spare part number
For use only with computer models equipped with graphics subsystems with discrete memory	531814-001
For use only with computer models equipped with graphics subsystems with UMA memory	531813-001

✎To properly ventilate the computer, allow at least a 7.6-cm (3-in) clearance on the left side of the computer. The computer uses an electric fan for ventilation. The fan is controlled by a temperature sensor and is designed to turn on automatically when high temperature conditions exist. These conditions are affected by high external temperatures, system power consumption, power management/battery conservation configurations, battery fast charging, and software requirements. Exhaust air is displaced through the ventilation grill located on the left side of the computer.

Before removing the fan/heat sink assembly, follow these steps:

1.Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.

2.Disconnect all external devices connected to the computer.

3.Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.

4.Remove the battery (see “Battery” on page 6).

5.Remove the following components:

a.Hard drive (see “Hard drive” on page 8)

b.Memory module (see “Memory module” on page 10)

c.WLAN module (see “WLAN module” on page 11)

d.Optical drive (see “Optical drive” on page 16)

e.Keyboard (see “Keyboard” on page 18)

f.Keyboard cover (see “Keyboard cover” on page 20)

g.Right speaker (see “Right speaker” on page 22)

h.Top cover (see “Top cover” on page 23).

i.Left speaker (see “Left speaker” on page 28)

j.Display assembly (see “Display assembly” on page 29).

k.System board (see “System board” on page 41).

4–44 Maintenance and Service Guide